JPS6241688A - Cloth guide apparatus of cloth edge cutter of sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a cloth guide device for a cloth edge cutter of a sewing machine. More specifically, it is linked to the needle bar of the sewing machine,
This invention relates to a fabric guide device for a fabric edge cutter of a sewing machine that utilizes the vertical movement of a needle bar.

(Prior art) The cloth edge cutter of a sewing machine that has been used in the past connects to the swinging arm attached to the needle bar of the sewing machine when it swings as the needle bar moves up and down. The protruding lever member moves up and down using the pivot point with the support member as a lever fulcrum, and the upper knife attached to the end of the lever member also moves up and down at the same time, and the base returns to the position facing the upper knife. This is a guide that cuts the edges of the fabric fed into the upper and lower knives by working together with the lower knife blade formed at the end, and has a guide wall at the end between the lower knife and the support member. A cloth presser consisting of a presser foot and a presser leg is provided integrally with the support member in contact with the guide piece.

(Problem to be Solved by the Invention) When this fabric edge cutter is installed on all sewing machines, the swing arm must be screwed to the needle bar, and at the same time, the entire cutter must be placed on the sewing machine bed so that it does not move. However, consider the position of the presser between the fabric guide piece installed close to the upper knife and the front of the upper knife (which works in conjunction with the arm feed teeth in the fabric feeding direction to press and feed the fabric). It is easy to put the fabric edge cutter into the lamination machine and install it on the table.

However, when the fabric to be cut is fed along the wall of the guide piece from below the protruding end of the lever member with the lower knife attached, and the edges are cut with the upper and lower knives, the fabric may be cut by the guide piece. It gets caught between the wall and the presser foot of the presser foot and cannot be fed in the desired direction, making it difficult to cut the edge in the desired direction or sew the edge with the thread attached to the needle bar. There were problems such as not being able to do it smoothly.

(Means and Actions for Solving the Problems) In order to eliminate the above-mentioned problems, the present invention provides a force for covering the protrusion of the U-shaped lever member with the upper knife attached to the end, and a guide for the S member. A configuration is provided in which a guide device having a head and a body with slits for fitting into the legs and the cup ζ member is detachably mounted.

By fitting this guide device to the cover member that covers the protruding arm of the U-shaped lever member with the upper knife attached to the end, the presser foot and the guide can be removed from the protruding arm of the U-shaped lever member for edge cutting. The fabric fed into the wall of the piece is smoothly fed out in the desired direction and the edges can be cut and sewn efficiently.

(Example) The present invention will be described in detail below with reference to the accompanying drawings.

First, we will discuss the structure of the fabric edge cutter of the sewing machine to which the entire apparatus according to the present invention is attached. The accompanying drawings, FIGS. 4 to 9, illustrate the Minn fabric hem cutter described above.

The lever member 2 is pivoted 6 on the support arm 4 so as to form a full lever fulcrum. The lever member 2 is formed in a U-shape, and a first protruding arm 8 at one end thereof is pivotally connected to a swinging arm 12, which will be described later, via a connecting piece 10' (I-). This screw is pivotally connected to the first protruding arm 8 and the swinging arm 12.The front end of the second protruding arm 20 formed at the other end of the lever member 2 is provided with a blade portion 24t at its lower end. The upper knife 22 is removably attached with a screw 26. The swinging arm 12 is attached with a screw 30.
The support arm protrusion 28 is pivotally connected to the supporting arm projection 28, one end of which is pivotally connected to the connecting piece 10 by the screw 18 as described above, and a U-shaped bifurcated portion 32 is formed at the other end. The swinging arm 12 is connected to the two-pronged T! by means of a needle mounting screw 38 of a needle bar 36 having a sewing machine needle 34 attached to the end thereof. At A32, it is connected to the needle bar 36. Further, the surface facing the upper knife blade part 24 at the end of the lower knife plate 40 provided below the support arm 4 in parallel with the second protruding arm 20 is formed into a blade part 42 of the lower knife. A presser leg 46 is formed at the end of an L-shaped support plate 44 protruding from the support arm 4 approximately parallel to the lower knife plate 40, and a presser foot 50 is mounted on a horizontal shaft 48 of the presser leg 46 so as to be vertically movable. pivot. The presser foot 50 is provided with all needle holes 52. 51 is a tongue piece provided on the presser foot 50. A guide piece 54 is provided between the L-shaped support plate 44 and the lower knife plate 40 so as to form substantially the same plane therewith, and a guide side wall 56 is entirely erected on the presser foot 50 side. Reference numerals 58 and 59 are cover members, which are divided into a portion 59 that covers the 111th surface of the support arm 4, a force exerted on the second protruding arm 20, and six portions 58; One power,
7 portion 58a and its entire end L-shaped edge 58c'i
The cover portion 58b has a cover portion 58b.

A presser bar 62 of the sewing machine is screwed 60 onto the presser foot 46, and the needle bar 36 is further connected to the bifurcated portion 32 of the swinging arm 12 with a screw 38. 2 Next, a cloth guide device attached to the above-mentioned sewing machine cloth edge cutter will be explained. This guide device can be detachably attached to the edge cutter of the sewing machine.

The cloth guide device consists of a head part; 1, a body part T), and a leg part C;
The head a has an approximately half-moon shaped outer piece 71 integrally formed with the wall surface 70 and a small inner piece 72 concentric with the outer piece 71, and an elongated first slit 74 formed by these two pieces. A wall 76 is formed at the end of the body, and a second slit 75 is formed at the end of the body. Two third slit trays O are formed. Reference numeral 73 denotes a sloped portion of the body which is connected to the wall surface 70 and is inclined in the direction of the wall surface 70. Further, substantially rectangular leg portions C are provided protruding from the wall portion 76. Further, the cloth guide device according to the present invention is most preferably made of transparent synthetic resin.

Next, a state in which the guide device according to the present invention is attached to a complete sewing machine fabric edge cutter will be explained. In Figures 4 and 9,
The end portion of the cover member 58 of the second protruding arm is pushed so that the first slit 74 formed by the outer piece 71 and the inner piece 72 of the guide device is fitted into the end portion of the cover member 58a, and the second slit 75 is inserted into the cover member 58a. The wall portion 76 of the body part is located outside the root cover 58a of the cover member, and the third slit 80 thereof is fitted into the horizontal edge of the L-shaped edge 58c of the end cover member 581). If the guide device is attached to the 7 member 58 so as to fit into the vertical part of the L-shaped edge 58c, the leg part C will be placed in front of the lower knife plate 40 (towards FIG. 9). The lower knife plate 40 is attached so that the upper surface of the leg C is positioned slightly higher than the upper surface of the lower knife plate 40. Of course, the leg C is positioned in front of the presser foot 50 (towards FIG. 9).

The vertical movement of the needle bar 36 due to the driving of the sewing machine is converted into the vertical movement of the swing arm. When the needle bar 36 rises, the two end prongs 32 of the swinging arm 12, which are pivotally supported by the screw 30 on the protrusion 28 of the support arm 4, are pulled up, and at the same time, the other end is lowered, and the screw 18, The first protruding arm 8 of the lever member 2 is pulled down via the connecting piece 10 and the screw 16. - the second protruding arm 20 of the lever member 2 rises in the opposite direction to said first protruding arm 8;

The blade 24 of the upper scalpel 22 attached to the end thereof comes into contact with the blade 42 of the lower knife and moves upward. Next, when the needle bar 36 descends, the swing arm 12 and other related members move in the opposite direction to the above, and the upper knife 22 contacts the blade portion 42 of the lower knife and descends. Therefore, the edge of the fabric sent below the second protruding arm 20 is sheared by the upper and lower knives. The fabric from which the edges have been sheared is fed under the presser foot 50 in the direction of arrow A in FIG. Upper thread and presser foot 50
A seam is formed on the fabric by the bobbin thread being pulled up from the lower bobbin. The seams can be formed not only by lock stitches but also by zigzag stitches at the edges of the fabric.

When cutting a seam with the fabric edge cutter described above, it takes one worker to pass all of the fabric through the upper and lower knife blades 34 and 42 so that the fabric can be fed forward correctly and the edges can be cut and sewn accurately. must act with care so that it is carried out.

In such a case, the purpose can be easily achieved by using the guide device according to the present invention. The fed fabric first rides on the upper surface of the leg C of the guide device, passes through it completely, and is smoothly fed into the upper and lower knives for cutting action, and is also fed under the presser foot 50. Edges can be cut and sewn smoothly.

Furthermore, the head a of the guide device is connected to the entire end 58b of the cover member.
Because it is attached, it can also prevent danger when the upper and lower knives operate.

(Effects of the Invention) The cloth guide device of the cloth edge cutter of the sewing machine according to the present invention can be detachably attached, and can smoothly feed the cloth to the cloth edge cutter to easily and accurately cut and sew the edges. It has the effect of being able to be implemented in many cases.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of a guide device for a fabric edge cutter of a sewing machine according to the present invention. FIG. 2 is a perspective view of FIG. 1. FIG. 3 is another perspective view of FIG. 1. FIG. 4 is a side view of a fabric edge cutter of a sewing machine to which a guide device according to the present invention is attached, and the attached state of the guide device is shown by chain lines. FIG. 5 is a plan view of FIG. 4. FIG. 6 is a plan view of FIG. 4 with the cover member removed. Figure 7 is a front view of Figure 4. FIG. 8 is a bottom view of FIG. 4. FIG. 9 is a right side view of FIG. 4.

Claims (1)

[Claims] 1. Attach the upper knife to one of the U-shaped protruding arms of the U-shaped lever member pivotally attached to the support member so as to configure a predetermined leverage ratio, and The arm is connected to a swinging arm that is detachable from the needle bar of the sewing machine, a lower knife blade is provided at a position in contact with the upper knife blade, and a cutting cloth guide section is provided between the support member and the upper knife. In a fabric edge cutter for a sewing machine, which is provided with a fabric presser foot consisting of a presser foot and a presser foot integrally with the support member on the outside, the protruding arm of the lever member to which the upper knife is attached is attached to the end of the cover member. a head having a first slit to be fitted;
A fabric edge of a sewing machine having a body section having a second slit and a third slit that fit into the edge of the end of the cover member, and a leg section located in contact with a lower knife plate having a lower knife formed at the end. Cloth guide device for cutting machine. 2. A fabric guide device for a fabric edge cutter of a sewing machine as set forth in claim 1, which is detachably attached to the fabric edge cutter of a sewing machine. 3. A cloth guide device for a cloth edge cutter of a sewing machine according to claim 1, which is made of a transparent synthetic resin or the like.